Caster Wheel Bumper Impact Absorption

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Solution Overview

Problem

Caster wheels and the objects they support are prone to damaging other objects or surfaces, and vice versa, due to their design and potential for accidental impact, especially when they extend outward or have hard edges.

Innovation Solution

A protective bumper is designed to be attached to a caster wheel assembly, extending around the wheel to absorb impacts and distribute forces, featuring an inner frame coupled to the wheel via an axle bolt and an outer bumper made of soft material to cushion collisions, ensuring the bumper is the first point of contact, thus preventing damage to the wheel, supported objects, and surrounding surfaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the caster wheel extends outwardly from the article to enable movement, then the mobility and accessibility of the article is improved, but the risk of damaging other objects or surfaces increases

Engineering Contradiction:

ImprovemobilityVSAvoiddamage risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The bumper acts as an intermediary element between the caster wheel and other objects. It is attached to the caster wheel assembly and extends outwardly to intercept contact before the wheel or article can directly strike other objects, thereby preventing damage while preserving mobility

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The bumper provides preliminary protection by being positioned outwardly from the caster wheel assembly. It performs the protective function in advance, intercepting potential impacts before they can reach the wheel or supported article, thus preventing damage proactively

Inventive Principle:

Principle #10Preliminary action

2Strength

If the article includes hard edges or surfaces for structural integrity, then the strength and durability of the article is improved, but the potential for damaging other articles or surfaces during accidental impact increases

Engineering Contradiction:

Improvestructural integrityVSAvoidimpact damage

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

The bumper applies local quality by providing a soft, impact-absorbing surface at the specific location where contact with other objects occurs. While the article maintains its hard edges for structural integrity, the bumper locally modifies the interaction surface to be damage-preventive

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The bumper converts the potentially harmful hard edges and surfaces of the article into a beneficial protective system. By attaching the soft bumper to the caster wheel assembly, the hard structural elements are transformed into a configuration where the bumper absorbs impact energy that would otherwise be transmitted by the hard edges

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Reliability

If the protective bumper extends a sufficient distance outwardly from the caster wheel to be the first point of contact, then the protection effectiveness is improved, but the device complexity and space occupation increase

Engineering Contradiction:

Improveprotection effectivenessVSAvoidbumper structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The bumper serves multiple functions simultaneously: it provides impact absorption, extends the protective envelope outwardly, and attaches to the existing caster wheel assembly using standard mounting methods. This multi-functionality achieves comprehensive protection without proportionally increasing complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The protective bumper effectively reduces damage to objects and surfaces by absorbing impacts and distributing forces, ensuring the caster wheel assembly and supported objects are protected from collisions regardless of orientation, maintaining the functionality of the wheel assembly.

Implementation Method 1

the outer bumper portion extends substantially or entirely around a periphery of the caster wheel assembly... the outer bumper portion made of relatively soft material... absorb impacts and distribute forces

Methodology Applied

Scientific EffectImpact absorption: Damping

Data Source

PatentUS8904597B2Caster wheel bumper

Publication Date: 2014.12.09 PIPP MOBILE STORAGE SYSTEMS INC

AI summary

A protective bumper attaches to a caster wheel assembly and substantially surrounds the assembly to act as a point of contact with other objects or articles, in order to limit or prevent damage to struck objects, and/or to the caster wheel assembly, and/or to a movable object or article supported on the caster wheel assembly. The protective bumper includes an outer bumper portion and an inner frame portion that attaches to a frame of the caster wheel assembly. The bumper may be attached to the caster wheel assembly via an axle that rotatably couples a wheel to the frame of the wheel assembly. Optionally, the outer bumper portion may be fitted with a relatively soft annular outer member or surface.